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Gerald Herbert, Associated Press
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, greets campaign volunteers at a phone banking center in Las Vegas, Nev., Friday, Feb. 3, 2012.

LAS VEGAS — Mitt Romney expects Nevada's caucuses to kick off a month of primary and caucus contests to keep momentum on his side in the race for the GOP presidential nomination.

Polls show Romney far ahead in advance of Saturday's voting, which follows months of organizing by the campaign of the former Massachusetts governor. Next up are Colorado and Minnesota, two other states he won in 2008, and later in February is his home state of Michigan.

Just one debate is planned this month, which diminishes the chances that his chief rival, Newt Gingrich, can renew his candidacy with a highly publicized head-on challenge.

Romney told supporters on Friday that he expects a great showing in Nevada's caucuses.